Q: My car will start and the theft light comes on then car jerks

asked by on February 17, 2017

My car will start the theft light will come on and then it turns off car will drive then theft light comes back on then car starts jerking and bucking and the speedometer and also the rpm gauges go up and down then itll be fine for a few seconds then do it again. I tried unhooking the battery cables and rehooking them to reset the system and it got worse

My car has 176000 miles.
My car has an automatic transmission.

Hello, and thank you for writing in. When multiple sensors and warning lights appear to fail, the culprit is typically electrical. You may want to start with a basic charging system test, which would include testing the battery and the alternator. This can be done at home with a voltmeter, or at your local automotive parts store. If the charging system passes, then you may want to look into the fuses and relays, as well as check your major electrical ground connections (fuse box, battery, alternator, and the wiring). While it may be an issue with the anti-theft, with the other systems having issues as well, the anti-theft is more likely having issues resulting from a power supply problem. For more help resolving the issue, contact our service department to schedule an appointment.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Engine is misfiring and the service engine soon light is on.

Hi there. If the engine is misfiring you would need to check the spark plugs and fuel injectors to see what is not working. If the spark plug has no spark, then check the spark plug wire for spark by-passing...

Car running rough and trying to stall

Hi. The idle air control valve needs replacing because it sounds like the idling is rough on your vehicle. Also, if you have a pulley starting to seize up, which include the idler pulley and the tensioner pulley, they may...

Transmission shudders when accelerating from a stop

This may be related to a faulty transmission control solenoid or low transmission fluid. As you may know, automatic transmissions use pressurized hydraulic fluid to change gears. When a gear change is required, the car's computer activates a transmission solenoid,...

Related articles

5 Essential Things to Know About Your Car's Anti-Theft Device
Your Your car’s anti-theft device is installed in an effort to help protect your investment from thieves. Most cars today include a variety of these devices and systems that not only protect the car, but also deter theft in the...
2012 Hyundai Elantra vs. 2012 Ford Focus: Which One Should I Buy?
The Hyundai Elantra and the Ford Focus are both offerings in the inexpensive compact sedan category, and both represent some of the best offerings in that class. Compact cars are slightly larger than a subcompact, but smaller than a mid-size;...
The Best Used Cars to Buy If You Need to Haul a Motocross Bike
Of Of course you would love to be able to ride your motocross bike everywhere, but the reality is, at some point you're going to need to transport it. A cargo van of almost any make or model would be...